Prosper Loan Data Exploration by Masa Hayakawa
This report explores Prosper Loan dataset that contain loan information for approximately 114,000 loan records.
Univariate Plots Section
First of all, in this section, I would like to perform some preliminary exploration of the dataset.
Original Prosper loan dataset contains approximately 114,000 observations and 81 variables. I have created a subset from original data so that I can only focus on already closed loans. Also, I have picked up only necessary variables. Thus, the dataset in this report includes 55,084 observations with 16 variables as follows.
## [1] 55084 16Structure of the dataset is listed as follows:
## 'data.frame': 55084 obs. of 16 variables:
## $ LoanOriginalAmount : int 9425 3001 1000 4000 10000 3000 2000 4000 4000 10000 ...
## $ BorrowerRate : num 0.158 0.275 0.133 0.318 0.125 ...
## $ StatedMonthlyIncome : num 3083 2083 1667 5500 5833 ...
## $ DebtToIncomeRatio : num 0.17 0.06 0.27 0.49 0.12 0.09 0.39 0.11 0.26 0.11 ...
## $ MonthlyLoanPayment : num 330.4 123.3 33.8 173.7 334.5 ...
## $ ProsperScore : num NA NA NA 5 NA NA 5 3 9 9 ...
## $ IncomeRange : Factor w/ 8 levels "$0","$1-24,999",..: 4 7 2 5 7 4 4 4 6 4 ...
## $ LoanStatus : Factor w/ 12 levels "Cancelled","Chargedoff",..: 3 3 3 5 2 3 5 3 3 3 ...
## $ EmploymentStatus : Factor w/ 9 levels "","Employed",..: 9 4 3 6 4 3 2 2 3 2 ...
## $ IsBorrowerHomeowner : Factor w/ 2 levels "False","True": 2 1 1 2 2 1 1 1 2 1 ...
## $ ProsperRating..Alpha. : Factor w/ 8 levels "","A","AA","B",..: 1 1 1 8 1 1 6 7 2 2 ...
## $ LoanOriginationDate : Factor w/ 1873 levels "2005-11-15 00:00:00",..: 426 260 451 1399 160 488 1655 1609 941 1348 ...
## $ ListingCategory..numeric.: int 0 0 0 13 0 0 15 1 1 20 ...
## $ Term : int 36 36 36 36 36 36 36 60 36 36 ...
## $ ProsperRating..numeric. : int NA NA NA 1 NA NA 3 2 6 6 ...
## $ IsDefaulted : chr "Completed" "Completed" "Completed" "Defaulted/Charge-off" ...Summary of each variables are as follows:
## LoanOriginalAmount BorrowerRate StatedMonthlyIncome DebtToIncomeRatio
## Min. : 1000 Min. :0.0000 Min. : 0 Min. : 0.00
## 1st Qu.: 2600 1st Qu.:0.1350 1st Qu.: 2811 1st Qu.: 0.13
## Median : 4500 Median :0.1945 Median : 4167 Median : 0.20
## Mean : 6262 Mean :0.2004 Mean : 5055 Mean : 0.29
## 3rd Qu.: 8000 3rd Qu.:0.2699 3rd Qu.: 6250 3rd Qu.: 0.30
## Max. :35000 Max. :0.4975 Max. :618548 Max. :10.01
## NA's :4230
## MonthlyLoanPayment ProsperScore IncomeRange
## Min. : 0.00 Min. : 1.000 $25,000-49,999:16343
## 1st Qu.: 98.29 1st Qu.: 5.000 $50,000-74,999:12789
## Median : 172.60 Median : 6.000 Not displayed : 7737
## Mean : 223.73 Mean : 6.266 $75,000-99,999: 6442
## 3rd Qu.: 300.47 3rd Qu.: 8.000 $100,000+ : 6064
## Max. :2251.51 Max. :11.000 $1-24,999 : 4571
## NA's :29079 (Other) : 1138
## LoanStatus EmploymentStatus IsBorrowerHomeowner
## Completed :38074 Full-time :24957 False:29199
## Chargedoff :11992 Employed :16491 True :25885
## Defaulted : 5018 Not available: 5346
## Cancelled : 0 Self-employed: 2926
## Current : 0 : 2252
## FinalPaymentInProgress: 0 Part-time : 1056
## (Other) : 0 (Other) : 2056
## ProsperRating..Alpha. LoanOriginationDate
## :29079 2007-01-17 00:00:00: 137
## D : 5869 2011-08-31 00:00:00: 133
## E : 3830 2008-04-30 00:00:00: 128
## C : 3817 2008-05-28 00:00:00: 126
## HR : 3725 2011-09-30 00:00:00: 121
## A : 3608 2011-11-30 00:00:00: 120
## (Other): 5156 (Other) :54319
## ListingCategory..numeric. Term ProsperRating..numeric.
## Min. : 0.000 Min. :12.00 Min. :1.000
## 1st Qu.: 0.000 1st Qu.:36.00 1st Qu.:2.000
## Median : 1.000 Median :36.00 Median :3.000
## Mean : 2.408 Mean :36.94 Mean :3.663
## 3rd Qu.: 3.000 3rd Qu.:36.00 3rd Qu.:5.000
## Max. :20.000 Max. :60.00 Max. :7.000
## NA's :29079
## IsDefaulted
## Length:55084
## Class :character
## Mode :character
##
##
##
## Now, I would like to look into the dataset. Firstly, I would like to explore some of the univariate plots.
First histogram is showing right skewed distribution. I have transformed the long tail data to better understand the distriution. The transformed loan amount distribution appears to have unimodal with peaks between 5,000 - 7,000.
I would like to look at other numerical variables as well.
Histogram by Borrwer rate is showing slightly right skewed unimodal distribution with its peak around 0.15.
Histogram by loan term only shows 12, 36 and 60 months. Why are they so cloear cut? According to Prosper website[1], they seem to be offering only fixed term with either 3 or 5 years.
[1] https://www.prosper.com/ Prosper website
- When looking by borrower’s monthly income, there are some outliers in monthly income such as 618,548, as seen in the first plot.
- The second plot zoomed in under 10,000, the histogram shows slightly right skewed unimodal distribution.
## Min. 1st Qu. Median Mean 3rd Qu. Max.
## 0 2811 4167 5055 6250 618548- Summary shows that most of the borrower’s monthly income are between 2,800 to 6,250, with average of 5,055 and median of 4,167.
Next, I would like to look across categorical variables.
Firstly let’s look at the distribution by Income Range.
I was expecting to see more right skewed distribution, in ohter words, tendecy like borrower with lower income tend to borrow more. However, the plot shows unimodal distribution with peak around $25,000 and $50,000.
## [1] 0.8247404This plot shows distribution by Employment status. 82.4 % of the borrowers are employed in some form, i.e. either ‘Employed’,‘Full-time’, ‘Part-time’, or ‘Self-employed’.
## [1] 0.4699187Above plot showing distribution by whether or not the borrower is home owner. 46.9% of the borrowers are home owners.
Next, let’s have alook at distribution by risk indicators.
## Min. 1st Qu. Median Mean 3rd Qu. Max. NA's
## 1.000 5.000 6.000 6.266 8.000 11.000 29079Above plot by Prosper score is showing slightly left skewed unimodal distribution with its peak around 8 with median of 6 and most of them are between 5 and 8.
This plot shows distribution by Prosper rating. Borrowers seem to be distributed almost equally across each ratings, except ‘D’ has the prominently high density.
Also listed the summary for each ratings as below.
## Min. 1st Qu. Median Mean 3rd Qu. Max.
## 1000 2600 4500 6262 8000 35000## loandata_completed$ProsperRating..Alpha.:
## Min. 1st Qu. Median Mean 3rd Qu. Max.
## 1000 2500 4500 6160 7920 25000
## --------------------------------------------------------
## loandata_completed$ProsperRating..Alpha.: A
## Min. 1st Qu. Median Mean 3rd Qu. Max.
## 1000 3500 6000 8041 11000 35000
## --------------------------------------------------------
## loandata_completed$ProsperRating..Alpha.: AA
## Min. 1st Qu. Median Mean 3rd Qu. Max.
## 1000 3000 6500 8178 12000 25000
## --------------------------------------------------------
## loandata_completed$ProsperRating..Alpha.: B
## Min. 1st Qu. Median Mean 3rd Qu. Max.
## 1000 4000 7500 8559 12500 35000
## --------------------------------------------------------
## loandata_completed$ProsperRating..Alpha.: C
## Min. 1st Qu. Median Mean 3rd Qu. Max.
## 1000 3000 6000 7547 12000 25000
## --------------------------------------------------------
## loandata_completed$ProsperRating..Alpha.: D
## Min. 1st Qu. Median Mean 3rd Qu. Max.
## 1000 3000 5000 6033 8000 15000
## --------------------------------------------------------
## loandata_completed$ProsperRating..Alpha.: E
## Min. 1st Qu. Median Mean 3rd Qu. Max.
## 1000 3000 4000 4300 5500 15900
## --------------------------------------------------------
## loandata_completed$ProsperRating..Alpha.: HR
## Min. 1st Qu. Median Mean 3rd Qu. Max.
## 1000 2500 4000 3397 4000 16800Finally, I would like to see what are the proportion of defaulted/charged-off loans.
The first plot shows the proportion of completed loans, defaulted loans, and charged-off loans. In the second plot, I just combined defaulted loans and charge-off loans togerther, to compare with the completed loans.
## [1] 0.6911989Almost 70 % of closed loans are completed without being defaulted/charge-off.
Univariate Analysis
What is the structure of your dataset?
Original Prosperloan dataset consists of 81 variables, with approximately 114,000 observations. I have created a subset of 55,084 observations that have closed status and also only use 16 variables.
What is/are the main feature(s) of interest in your dataset?
The main features of interest are Categorical factor variables listed as below:
- IncomeRange: $0, $1-24,999, $25,000-49,999, $50,000-74,999, $75,000-99,999 , $100,000+, ‘Not displayed’, and ‘Not employed’
- LoanStatus: Cancelled, Chargedoff, Completed, Current, Defaulted, FinalPaymentInProgress, PastDue
- EmploymentStatus: Employed, Full-time, Not available, Not employed, Other, Part-time, Retired, and Self-employed
- IsBorrowerHomeowner: TRUE, FALSE
- ProsperRating..Alpha.: (Higher -> Lower) AA, A, B, C, D, E, HR
- ProsperScore: Ranges from 1-10, with 10 being the best
What other features in the dataset do you think will help support your  investigation into your feature(s) of interest?
Other variables such as BorrowerRate, StatedMonthlyIncome, DebtToIncomeRatio, MonthlyLoanPayment, and Term, likely contribute to further analysis.
Did you create any new variables from existing variables in the dataset?
- IsDefaulted: ‘Defaulted/Charge-off’: defaulted or charged off, ‘Completed’: Completed, determined based on LoanStatus.
Of the features you investigated, were there any unusual distributions?
Did you perform any operations on the data to tidy, adjust, or change the form
of the data? If so, why did you do this?
- LoanOriginalAmount: I have log-transformed the right skewed distribution in the second plot of this section.
- StatedMonthlyIncome: Histogram eliminated some outliers such as monthly income of 618,548 that appears to be unrealistic for a personal loan borrower.
Bivariate Plots Section
Correlations between variables
Firstly I have plotted a correlation matrix as below.
- Stated Monthly Income seems to have quite strong correlation with Prosper Rating(0.0697) and Prosper Score(0.0558).
- Borrower Rate also seems to have strong correlation with Stated Monthly Income(-0.0691).
- There also seems to be some correlation between loan amount and risk indicators such as Prosper rating and Prosper Score.
Now, I would like to look into the relation among individual variables more closely.
Firstly, I would like to see the relation between Prosper Score and Monthly Income, and also Prosper rating and monthly income, that are showing the strongest correlation in above chart.
- The first plot shows the trend that the higher the bowroower’s income, the better rating the borrowers get.
- Similar trend can be observed with Prosper score in the second plot, though it is not as drastic as wtih the rating.
Next, I would like to see how borrowers rate differs across Prosper rating and Prosper score.
- Seemingly, though each plot showing oppsite direction, both plots by rating and by score are showing predictable distribution.
- The higher the risk, the higher loan rate the borrowers are charged.
Next, I would like to see the correlation between Borrower rate and Monthly Income that also showing quite strong correlation of -0.0691 in the first correlation matrix.
The lm line showing the negative trend between Stated Monthly Income and Borrower rate. The hihger the monthly income, the lower the rate.
Next, I would like to see how the original loan amount varies by Prosper ratings.
- Loan amount seem to be ranged higher with better rating borrowers. With higher ratings between AA to C, mdeians are more than 6,000.
- In contrast, with lower ratings between D, E and HR, median are 5,000 or less.
It becomes more obvious when comparing the total in number and in amount for each ratings.
- This plot compares the the total number of borrowers and total amount of loan for each rating.
- Although the higher graded borrowers are alomost equal or relatively smaller than lower graded borrowers in number, they are much larger in loan amount.
What are the difference between Completed loans and Defaulted/Charge-off loans?
Next, I would like to explore what factors could affect whether or not a loan is to be defaulted?
Firstly, I would like to look this by loan amount.
- I was expecting to see more defaulted loans with the higher amount loans as I thought the more loan amount, the more difficult to complete repayment.
- To my suprise, however, above histograms are showing similar distribution pattern. There does not seem to be much difference in distribution by loan amount.
- This suggests that loan amount alone is not a strong factor to determine whether or not th eloan is defaulted.
Next, I would like to look into the distribution by monthly payment amount.
## loandata_completed$IsDefaulted: Completed
## Min. 1st Qu. Median Mean 3rd Qu. Max.
## 0.00 94.15 171.10 218.78 297.00 2251.51
## --------------------------------------------------------
## loandata_completed$IsDefaulted: Defaulted/Charge-off
## Min. 1st Qu. Median Mean 3rd Qu. Max.
## 0.0 107.4 173.7 234.8 307.2 1552.8- There does not seem much difference in distribution, too.
- When looking at the summaries, monthly payment amount of defaulted/charge-off loans is slightly higher than completed loans. For completed loans, median is 171.10 and mean is 218.78 but for defaulted/charge-off loans, median is 173.7 and mean is 234.8.
What can we see if we look this from the borrower rate?
Above plot compares the distribution by borrower rate.
- First histogram, representing completed loans, showing slight right skewed distiribution with its peak around 0.1.
- On the other hand, the second histogram, representing defaulted/charge-off, showing left skewed distribution with its peak around 0.3.
- This is interesting to see that the defaulted loans are more likely with higher borrower rate.
As we have seen earlier, the borrower rate seems to be determined based on risk factors, such as Prosper rating and Prosper scores.
Let’s have a look at the distribution by rating and score to see how it differs between completed loans and defaullted loans.
## loandata_completed$IsDefaulted: Completed
## Min. 1st Qu. Median Mean 3rd Qu. Max. NA's
## 1.000 5.000 7.000 6.537 8.000 11.000 18410
## --------------------------------------------------------
## loandata_completed$IsDefaulted: Defaulted/Charge-off
## Min. 1st Qu. Median Mean 3rd Qu. Max. NA's
## 1.000 4.000 5.000 5.427 7.000 11.000 10669- First set of plots with distribution by Prosper rating, Defaulted/Charge-off distribution seem to be negatively skewed to lower ratings comparing to Completed loans.
** The proportion of AA and A seem to be much smaller for Defaulted/Charge-off loans than Completed loans.
** Lower ratings such as E and HR have larger proportion with defaulted loans.
- Similar tendency can be seen with the second set of plots by Prosper scores.
** Defaulted/Charge-off loans has its peak around 5-6 whereas Completed loans has around 8.
** Summary shows 3rd quatile of Defaulted/charge-off loans is 7, whereas that of Completed loans is 8.
Bivariate Analysis
Talk about some of the relationships you observed in this part of the investigation.
How did the feature(s) of interest vary with other features in the dataset?
- There seems to be quite strong correlation between Borrower rate, Stated Monthly Income, Prosper rating, and Prosper score.
- Risk indicator such as ratings and scores seem to be showing some relation with whether or not the loan is defaulted.
- It may make sense to interpret that higher loan rate makes it difficult for lower rating borrowers to borrow larger amount, since higher loan rate consequently increases the total repayment amount.
Did you observe any interesting relationships between the other features
(not the main feature(s) of interest)?
- Unfortunately I did not find any intersting relationships between the features other than the main features.
What was the strongest relationship you found?
- Prosper Score and borrower rate and also Prosper rating and borrower rate are both showing quite strong correlation.
Multivariate Plots Section
- This plot shows how each Prosper Rating are distributed across loan amount and borrower rate. It seems to be indicating a tendency that the higher the borrower rate, the less amount borrower tend to borrow.
- Also it appears to be that the better the rating, the more amount borrowed.
I would like to look in the separated plots as below to see how the loan amount differs by Prosper rating.
Seemingly, borrowers with higher rating tend to borrow more amount with lower rate than lower graded borrowers.
Do the borrower with better rating or score repay more?
- Though it is not too obvious from the plot, the smooth lm line is suggesting a trend that the higher the income, the more payment the borrowers are capable of.
- Completed loans are occasionally paying more than 1,000 per month, while the defaulted loans are not.
## loandata_completed$IsDefaulted: Completed
## Min. 1st Qu. Median Mean 3rd Qu. Max.
## 0 2917 4417 5324 6583 618548
## --------------------------------------------------------
## loandata_completed$IsDefaulted: Defaulted/Charge-off
## Min. 1st Qu. Median Mean 3rd Qu. Max.
## 0 2500 3750 4451 5417 208333- Summary shows mean monthly income of the completed loans are approximately 900 higher than that of defaulted loans. Median is approximately 700 higher.
Finally I would like to see how the defaulted loans are distributed across Prosper rating and Prosper score on below scatter plot.
- The last plot shows how Complted and Defaulted/Charge-off loans are distributed across Prosper score and Prosper Rating.
- It is interesting that Defaulted/Charge-off loans are distributed relatively paler in higher score and rating, such as AA, A, and B.
Multivariate Analysis
Talk about some of the relationships you observed in this part of the
investigation. Were there features that strengthened each other in terms of
looking at your feature(s) of interest?
It seems Prosper rating and Prosper score have quite strong relation though it is difficult to say if this relation is strengthening each other. However, these 2 variables seems to be correaltes also with borrower rate.
Were there any interesting or surprising interactions between features?
It is not surprising to see there is strong correlation between risk indicators and borrower rate.
OPTIONAL: Did you create any models with your dataset? Discuss the
strengths and limitations of your model.
N/A
Final Plots and Summary
Plot One
Description One
For defaulted loans, the borrower rate range is distributed more in higher rates, comparing to the completed loans. This may suggest that the higher the loan rate, the more difficult for borrowers to complete the loan.
Plot Two
Description Two
Ratings and Scores seem to have quite strong correlation with borrower rate. These risk indicators semms to be used as a basis when determining borrower rate.
So, are these risk indicator effective to reduce the risk of default?
Plot Three
Description Three
Seemingly, defaulted/charge-off loans are distributed more in lower ratings such as D, E, and HR. However, defaulted loans still can be seen even with higher ratings.
Reflection
- I was expecting to see much more distinct difference between completed loans and defaulted loans and was hoping to identify any deterministic factors that decides whether or not a loan goes default. But my research and analysis did not reveal much findings as interesting as I expected.
- Most surprised and intersting finding was that there still are quite a few defaulted loans even with top ratings like AA, A, though it is true that the ratings and scores seem to be working to reduce the risk to some extent.
- Though my research did not explore, the charging higher rate to lower graded borrowers probably helps to optimize loan porpfolio.
Future work:
- In this report, analysis was conducted for closed loans aiming to find any patterns and any factors that affect whether or not a loan could go default.
- As a future work, I am interested in making any prediction on how much portion of current loans could go default.
- If I could have some more details about this dataset, especially the factors that determine ratings and scores, it might have been possible to find the features that strengthened each other, that possibly help to make such prediction.